Steel Beam Sizes / AISC / HSS Round / HSS 12.750x0.250

HSS 12.750x0.250 Steel Beam Dimensions and Properties

AISC Round HSS · v16.0

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Diagram, properties emphasis, and nearby alternatives use the selected unit system.

Units

Section diagram

HSS 12.750x0.250 dimensions

Not to scale. Dimensions shown for reference.

Section properties

Symbols match the steel section finder. Imperial and metric values are shown side by side.

Property Imperial Metric
Weight 33.41 lb/ft 49.70 kg/m
OD 12.800 in 324.000 mm
Nominal tw 0.250 in 6.350 mm
Design tw 0.233 in 5.920 mm
Area 9.16 in² 5,910.00 mm²
Ix 180.00 in⁴ 74,900,000 mm⁴
Iy 180.00 in⁴ 74,900,000 mm⁴
Sx 28.20 in³ 462,000.00 mm³
Sy 28.20 in³ 462,000.00 mm³
Zx 36.50 in³ 598,000.00 mm³
Zy 36.50 in³ 598,000.00 mm³
rx 4.43 in 113.00 mm
ry 4.43 in 113.00 mm
J 359.00 in⁴ 149,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 12.750x0.250.

Lighter in Round HSS

HSS 8.625x0.375

Weight
33.1 lb/ft (-1.0%)
Depth
— in
Ix
77.8 in⁴ (-57%)

Heavier in Round HSS

HSS 7.000x0.500

Weight
34.7 lb/ft (+4.0%)
Depth
— in
Ix
51.2 in⁴ (-72%)

Closest Iₓ in Round HSS

HSS 14.000x0.188

Weight
27.7 lb/ft (-17%)
Depth
— in
Ix
181.0 in⁴ (+0.6%)
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Source: AISC Shapes Database v16.0 · Methodology